Experts say temperatures will quickly climb to around 90 by noon Sunday, with highs in the mid 90s, while the heat index is expected to reach triple digits.

The forecast says temperatures will be slow to drop throughout the evening, but should manage to slip below 80 by midnight.

The high heat isn't expected to let up until Tuesday, as Monday's forecast calls for temps into the 90s.

The extended duration of heat will lead to uncomfortable to potentially hazardous conditions, particularly for the elderly and those with pre-existing health conditions.

Ready.gov says there are many ways to stay safe during heat advisories, including drinking plenty of fluids, finding air conditioning, avoiding strenuous activities and wearing light clothing. You should never leave pets or people in hot vehicles.